1905 suicides 19th-century Nigerian educators 19th-century photographers 19th-century translators CMS Grammar School, Lagos alumni Congo Free State officials Educators from Lagos French–English translators Nigerian expatriates in the Democratic Republic of the Congo Nigerian human rights activists Nigerian photographers Nigerian schoolteachers People of colonial Nigeria Portrait photographers Suicides in the Democratic Republic of the Congo Yoruba activists Yoruba businesspeople Yoruba educators Yoruba photographers